High Pressure Sodium Vapor Street Road Light Lamps 250W 400W E40 Tubular T46
High pressure sodium vapor street road light lamps 250W 400W E40 Tubular T46 Professional HID lamp manufacturer for more than 10 years , full range of High pressure Sodium lamps 50W ,70W,100W,150W, 250W,400W,600W,1000w,2000W.With European Standard and American standard . Features of High...
High pressure sodium vapor street road light lamps 250W 400W E40 Tubular T46
Professional HID lamp manufacturer for more than 10 years, full range of High pressure Sodium lamps 50W ,70W,100W,150W, 250W,400W,600W,1000w,2000W.With European Standard and American standard .
Features of High pressure Sodium lamps (bulbs):
1) High luminous efficacy, long service life and excellent fog-penetration capability.
2) They are extensively used for street lighting and illumination in airports, docks, wharfs, stations, squares, mines, etc
3) They can work on Europe magnetic ballast and electronic ballast.
250w High pressure sodium vapor street road light lamps E40 Tubular T46
SON-T 250W E40
STREET ROAD ,YARD,PUBLIC LIGHTING
400w High pressure sodium vapor street road light lamps E40 Tubular T46
SON-T 400W E40
WHAT IS HIGH PRESSURE SODIUM LAMPS:
High lumen output at high efficiency (1920 - Today)
A sodium-vapor lamp is a gas discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm.
There are two varieties of such lamps: low pressure and high pressure. Low-pressure sodium lamps are highly efficient electrical light sources, but their yellow light restricts applications to outdoor lighting such as street lamps. High-pressure sodium lamps produce a broader spectrum of light than the low-pressure lamps, but they still have poorer color rendering than other types of lamps.Low-pressure sodium lamps only give monochromatic yellow light and so inhibit color vision at night.
High-pressure sodium lamps (sometimes called HPS lights) have been widely used in industrial lighting, especially in large manufacturing facilities, and are commonly used as plant grow lights. They have also been widely used for outdoor area lighting, such as on roadways, parking lots and security areas. Understanding the change in human color vision sensitivity from photopic to mesopic and scotopic is essential for proper planning when designing lighting for roadways.
High-pressure sodium lamps are quite efficient—about 100 lm/W—when measured for photopic lighting conditions. The higher power lamps (600 W) have an efficiency of 150 lm/W.
As the high-pressure sodium arc is extremely chemically reactive, the arc tube is typically made of translucent aluminum oxide. This construction led General Electric to use the tradename "Lucalox" for their line of high-pressure sodium lamps.
Xenon at a low pressure is used as a "starter gas" in the HPS lamp. It has the lowest thermal conductivity and lowest ionization potential of all the non-radioactive noble gases. As a noble gas, it does not interfere with the chemical reactions occurring in the operating lamp. The low thermal conductivity minimizes thermal losses in the lamp while in the operating state, and the low ionization potential causes the breakdown voltage of the gas to be relatively low in the cold state, which allows the lamp to be easily started.